Use a minimum of 89 octane gasoline and always use fresh fuel. Only buy enough gasoline that you can easily use up within a two- month period. For air-cooled, two-cycle engines, use a quality mix oil that meets the engine manufacturer's recommendations.
Your chainsaw will need an unleaded, mid-grade gasoline with an octane rating of at least 89. This is one of the few times you'll want to spend the money for premium gas. Unlike other small engines, most chainsaws us a high-performance engine. If the octane rating is not at 89, you risk knocking your engine.
You can run anything from 87-octane to 125-octane AV-gas… the higher octane stuff may burn a little cleaner… it WILL smell different…
A 50:1 ratio with mid-grade (89 octane) or premium (93 octane) fuel can be used in all ECHO 2-stroke equipment, provided the oil is ISO-L-EGD and JASO M345 FD certified. A 50:1 Ratio = 1 US Gal. 89 octane/93 octane + 2.6 fl. oz.
STIHL recommends that customers use a minimum of 89 octane fuel. If a customer chooses to use a 91 or 93 octane fuel, no damage to the engine will result.
If you own a 4 stroke, for example, the 82-octane works just fine, but for a 2-stroke, you should go for the ethanol-free higher octanes (92 and 93) because the lower octanes tend to detonate.
Go Premium
Mid-grade unleaded gasoline with a minimum octane rating of 89 is recommended for your mixture. Fuel with a lower octane rating may increase engine temperatures, increasing the risk of piston seizure and damage to the engine.
What Octane Rating Should I Use? For those wondering “Is premium gas better for small engines?” the answer is most likely no. That's because small engines are not built with high compression ratios. There is no threat of engine knock taking place.
Yes. 93 octane does have more ethanol than 87. There is a common misunderstanding that ethanol is present in lower amounts in higher octane gas. In reality, it contains more.
When it comes to fuel, your best bet for a small engine is gasoline with an 89 octane rating.
Be sure to use 89 octane or higher unleaded fuel. For best results, use Husqvarna brand two-stroke engine oil that if FD certified. Always mix gasoline and oil in a clean fuel container, not in the chainsaw's fuel tank. Fill half the amount of gasoline to be used.
Let's start with the easy one. Most cars on the road recommend a standard grade 87 or 89. Premium gas 90-93 is completely okay to put in a standard vehicle. Car experts say there is no risk of damage to a standard car using premium fuel.
If your engine requires an 87 and you fill it up with a 93, then there's no harm done. You can go on your merry way without being anxious. This also means that there are no benefits either. Just because you used a higher-octane gas doesn't mean your car's performance will improve either.
In most places, regular gasoline has an 87 octane rating, while premium is 91 to 94 octane. A higher octane rating means the gas is more compatible with some engines' higher compression ratios. That term refers to the detonation of air and fuel that keeps an engine's pistons churning up and down.
Premium fuel is not only better for your equipment—it's better for the environment, too. High-octane gas and high-quality, synthetic oil are odor-free and burn cleanly, so you can operate your two-stroke equipment worry-free.
Gasoline that is 89 octane or higher is specifically recommended in engines that are two stroke and air cooled. Gasoline may contain a MAXIMUM of 10% Ethanol. Two stroke air cooled engines are approved to use a 87 octane rated clean gasoline in emergency situations.
E10 can be used in all current Husqvarna equipment, however, we recommend using at least 89-octane E10 gasoline, which is the mid-grade between regular and premium gasoline.
Non-Ethanol gas is the best option for your smaller summer engine equipment, machinery, and recreational vehicles. This includes chainsaws, lawn mowers, and motorcycles. Our non-ethanol fuel will ensure the proper care that your small engine needs for a life that will last longer.
However, when you're using gas with ethanol mixture in your outdoor power equipment, like lawn mowers, chainsaws, trimmers and leaf blowers, you run the risk of engine damage and incurring costly repairs. You should be using ethanol free gas in your small engine outdoor power equipment.
STIHL recommends the use of STIHL MotoMix® premixed fuel which is pre-mixed with STIHL HP Ultra synthetic oil. STIHL MotoMix® contains no ethanol and has a storage life of up to two years.
Engine computers can usually adjust their timing to account for the increased octane levels, so if you put premium gas in a regular car, you probably won't notice anything. However, some engines are not designed to burn higher-octane fuel, and you may see a reduction in performance and fuel economy.
The fuel commonly marketed is 87, 91 and 93 octane gasoline. The main difference between all of them is that the higher the octane rating, the greater the gasoline's capacity to withstand the compression produced inside the cylinders. In this way, combustion is carried out in a much smoother and more efficient way.
No, premium gas isn't a secret sauce for cleaning your engine. The main concern in engine maintenance is carbon build-up, which can happen over time with all fuel types if you skip routine checks. The good news is that both regular and premium gas have detergents that can reduce carbon deposits to an extent.